Insulator



July 10, 1956 c. PRICE 2,754,354

INSULATOR Filed Aug. 18, 1952 FIG. I.

FIG. 3.

INVENTOR CARL PRICE ATTORNEYS United States Patent 2,754,354 INSULATOR Carl Price, Los Angeles, Calif. Application August 18, 1952, Serial No. 304,885 2 Claims. (Cl. 174-158) This invention relates to television antennas and has, as its chief object, the production of an antenna which is readily convertible from one type to another to better suit reception conditions existing in different locations.

Another object is to produce a novel antenna insulator for mounting dipole, reflector and director elements, which enables such conversions and which also enables a user to accomplish various parasitic antenna arrays by the use of a number of such insulators.

Other and more subordinate objects Will appear hereinafter.

Without intending thereby to limit the broader scope of my invention, except as may appear from the appended claims, I shall now describe a presently preferred embodiment thereof primarily as a double-V type antenna which, however, has provisions for being converted into, for instance, an H-type antenna or to other parasitic arrangements. For the purpose of this description I shall refer to the accompanying drawings wherein Fig. l is a top plan view of an antenna embodying my invention; Figs. 2 and 3 are enlarged sections taken upon lines 22 and 33, respectively, of Fig. 1; Fig. 4 is an enlarged plan view of one of the insulators; and Fig. 5 is an enlarged plan view of a mounting insulator.

In Fig. 4 I show an insulator 5 suitable for mounting antenna elements such as the dipole or driven elements, or director elements or reflector elements; while in Fig. 5 I show a mounting insulator 6 which also may be used to support such antenna elements.

In Fig. 1 I show an antenna assembly of the double-V type wherein a mounting insulator 6 is secured to a pair of horizontally spaced parallel rods or tubes 15 and is mounted upon a supporting upright 17. Upon each of the respective ends of the tubes 15 I mount an insulator 5. in the particular example shown in Fig. 1 it is my preference to utilize the left insulator 5 to support the dipole elements 20, and the leads to the receiving set, not shown, are taken off those elements as shown by wires 21. The right-hand insulator 5 preferably supports reflector elements 25. The dipole and reflector elements described are of conventional construction, such as tube or bar stock, while the insulators 5 and 6 are made of an electrically insulative material such as a suitable plastic.

To enable the antenna to be secured on the supporting upright 17, it is my preference to secure to the underside of the mounting insulator 6 a U-shaped bracket 27 by means of bolts 28, and a U-bolt 29 passes around the upright and extends through holes in the bracket, the upright being thus clamped between the U-bolt and the bracket by nuts 30.

Each of the insulators 5 has a central body or web portion 35 provided with longitudinal strengthening ribs 36, and each end has a boss or relatively thickened and widened portion 3'7, 38, each presenting a pair of crossed intersecting grooves 39, 40 of semi-circular cross section. At the center of the intersection of those grooves I provide a bolt passing hole 42 to receive a mounting bolt 43 which not only secures the insulator to a tube 15 but also secures a dipole element 20, or a reflector element 25, as the case may be, to the insulator. Preferably the grooves 39, 40 are disposed approximately at 45 degree angles to each other.

The mounting insulator 6 comprises a flat medial body portion 45 provided with longitudinal strengthening ribs 2,754,354 Patented July 10, 1956 46, and has at its respective ends relatively thickened and widened boss portions 47, 48, each of which is provided with a pair of crossed intersecting grooves 49, 50 of semi-circular cross section, like grooves 39, 40, for the purpose to be described. At the intersection of each pair of grooves I provide a bolt passing the hole 51 to receive a bolt 52 for securing the insulator to a tube 15 as well as to a dipole element as will be described.

Each of the insulators 5 has, in the under surface of each of its end portions, a transverse groove 55, of semicircular cross section, which grooves are to receive the tubes 15, while the mounting insulator 6 has a like pair of grooves 55 for the same purpose.

From the foregoing description it will be apparent that an antenna array of the double-V type, shown in full lines in Fig. 1, may be produced, or an H-type antenna may be produced by utilizing the grooves 49 in the insulator 6 to mount dipole elements, denoted in broken lines by the numeral 20a; by mounting reflector elements, shown in broken lines designated by the numeral 60, in the grooves 39 of the left insulator 5, and by mounting a set of director elements, shown in broken lines and denoted by the numeral 61, in grooves 39 of the right insulator 5. In this case the lead wires to the receiver, not shown, would be taken off the dipole elements 20a as shown at 66.

it will also be apparent that the device of Fig. 1 could be converted into a Yagi type antenna by utilizing additional insulators 5 at the right-hand end of end portion of tubes 15 and by utilizing those additional insulators to mount additional director elements such as 61. In other words it will be apparent that by using one or more insulator elements 5 various arrays of antenna elements are readily obtainable.

I claim:

l. In a television antenna having dipole elements, an insulator comprising a generally rectangular body of electrically insulative material having relatively thick and relatively wide end portions each provided in its top surface with a pair of crossed, intersecting dipole element receiving grooves and provided in its bottom surface with a transverse groove beneath each pair of dipole elementreceiving grooves to receive a supporting rod, said body being recessed at one of its side margins to form a seat for a mounting mast.

2. in a television antenna having dipole elements, an insulator comprising an elongated body of electrically insulative material having relatively thick and wide end portions each provided on one surface with a pair of crossed, intersecting dipole element receiving grooves and on its opposite surface with a transverse groove to receive a supporting rod, said end portions each having a boltreceiving hole from said one surface to said opposite surface located centrally of said intersection of said crossed grooves in said one surface and centrally of the transverse groove in said opposite surface whereby to permit the securing of a dipole element in one of said crossed grooves and a supporting rod in said transverse groove with one bolt.

References Cited in the file of this patent UNITED STATES PATENTS 2,199,050 Jenkins Apr. 30, 1940 2,481,801 Valach Sept. 13, 1949 2,532,094 Gonsett Nov. 28, 1950 2,559,148 Ercolino July 3, 1951 2,631,235 Sherifi Mar. 10, 1953 OTHER REFERENCES Vee-D-X Colinear Array, circular of the La Pointe- Plascomold Corp., Windsor Locks, Conn. Received U. S. Patent Office April 20, 1951. 

